Tensile tear resistant reinforced cpvc cable protection pipe

Abstract

The utility model discloses a kind of tensile tear-resistant reinforced CPVC cable protection pipe, it includes pipeline, the inside fixed connection of pipeline has CPVC resin, the inside fixed connection of CPVC resin has nano calcium carbonate, the inside fixed connection of nano calcium carbonate has calcium-zinc stabilizer.Through the above structure, there is a layer of CPVC resin in pipeline, the smooth surface of CPVC resin can reduce the contact area of cable and pipe wall, reduce the local temperature rise caused by heat generation due to friction, while the air gap between pipe wall and cable is more uniform, beneficial to the heat dissipation of cable operation, prolong the service life of cable, there is also a layer of nano calcium carbonate in it, nano calcium carbonate particle size is usually 10~100nm, specific surface area is large and dispersibility is good, uniformly filled in CPVC resin matrix can form "rigid particle reinforcing effect", the tensile strength of inner wall layer is improved by 20%~30%, and bending modulus is improved by 15%~25%.

Description

Technical Field

[0001] This utility model relates to the field of cable protection pipe technology, and in particular to a reinforced CPVC cable protection pipe that is resistant to tensile and tearing. Background Technology

[0002] Reinforced CPVC cable protection pipe with tensile and tear resistance is a type of cable protection pipe made of chlorinated polyvinyl chloride (CPVC) as the main raw material. Through structural optimization or material modification, its tensile and tear resistance properties are significantly improved. It is mainly used to protect cables from external damage and is suitable for power, construction, communications and other fields.

[0003] In existing technologies, by adding reinforcing materials or optimizing the pipe structure, the mechanical defects of CPVC itself can be compensated, and its tensile strength and tear strength can be significantly improved while maintaining its original weather resistance and corrosion resistance. However, some devices are prone to releasing hydrogen chloride gas at processing temperatures, which can lead to molecular chain breakage, material discoloration, and yellowing to blackening. In addition, CPVC itself is a hard and brittle material with an elongation at break of only 5% to 10%. When the pipe is subjected to tensile or tearing loads, the matrix is ​​prone to rapid brittle fracture, resulting in a 10% to 20% reduction in tensile strength and a 25% to 40% reduction in tear strength. Utility Model Content

[0004] The purpose of this invention is to provide a reinforced CPVC cable protection pipe with a particle size typically between 10 and 100 nm, a large specific surface area, and good dispersibility. When uniformly filled into a CPVC resin matrix, it can form a "rigid particle reinforcement effect," increasing the tensile strength of the inner wall layer by 20% to 30% and the flexural modulus by 15% to 25%. This solves the problem that the pipe is prone to crack propagation in low-temperature environments or when subjected to mechanical impacts, especially in buried installations where soil pressure or stone compression can cause the pipe to crack and lose its protective function for the cable.

[0005] This utility model also provides a reinforced CPVC cable protection pipe with the above-mentioned tensile and tear resistant properties, including a pipe, wherein CPVC resin is fixedly connected inside the pipe, nano-calcium carbonate is fixedly connected inside the CPVC resin, and calcium-zinc stabilizer is fixedly connected inside the nano-calcium carbonate.

[0006] According to the present invention, a reinforced CPVC cable protection pipe resistant to tensile and tearing is provided, wherein the calcium-zinc stabilizer is internally fixed with an epoxy resin coating.

[0007] According to the present invention, a reinforced CPVC cable protection pipe resistant to tensile and tearing is provided, wherein glass fibers are fixedly connected inside the epoxy resin coating.

[0008] According to the present invention, a reinforced CPVC cable protection pipe resistant to tensile and tearing is provided, wherein a cable is fixedly connected inside the glass fiber.

[0009] Beneficial effects:

[0010] 1. This technical solution provides a tensile and tear-resistant reinforced CPVC cable protection pipe. Inside the pipe is a layer of CPVC resin. The smooth surface of the CPVC resin reduces the contact area between the cable and the pipe wall, reducing the local temperature rise caused by frictional heat generation. At the same time, the air gap between the pipe wall and the cable is more uniform, which is conducive to heat dissipation during cable operation and extends the service life of the cable. Inside the pipe is also a layer of nano-calcium carbonate. The nano-calcium carbonate particle size is usually 10-100nm. It has a large specific surface area and good dispersibility. When uniformly filled in the CPVC resin matrix, it can form a "rigid particle reinforcement effect", which increases the tensile strength of the inner wall layer by 20%-30% and the flexural modulus by 15%-25%.

[0011] 2. A layer of calcium-zinc stabilizer is embedded within the nano-calcium carbonate. The fatty acid salts in the stabilizer provide internal lubrication, reducing the viscosity of the CPVC melt and minimizing weld lines and surface roughness during extrusion molding. Simultaneously, its lubricity reduces frictional resistance between the pipe's inner wall and the cable sheath, facilitating cable installation. Furthermore, an epoxy resin coating is present inside. After curing, the epoxy resin forms a three-dimensional network structure with significantly higher tensile strength and elastic modulus than CPVC resin, creating a deformation-resistant "support layer" on the pipe's inner wall. When the pipe is subjected to radial compression or axial tension, the epoxy resin coating reduces localized stress concentration by 30%–40% through stress dispersion, preventing cracks in the CPVC matrix caused by stress concentration. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0013] Figure 1 This is a structural diagram of a reinforced CPVC cable protection pipe with tensile and tear resistance according to this utility model;

[0014] Figure 2 This is a schematic diagram of the epoxy resin coating of a reinforced CPVC cable protection pipe with tensile and tear resistance proposed in this utility model.

[0015] Legend:

[0016] 1. Pipes; 2. CPVC resin; 3. Nano calcium carbonate; 4. Calcium-zinc stabilizer; 5. Epoxy resin coating; 6. Glass fiber; 7. Cables. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] Reference Figure 1-2 This utility model provides a reinforced CPVC cable protection pipe with tensile and tear resistance, which includes a pipe 1, a CPVC resin 2 fixedly connected inside the pipe 1, a nano-calcium carbonate 3 fixedly connected inside the CPVC resin 2, and a calcium-zinc stabilizer 4 fixedly connected inside the nano-calcium carbonate 3.

[0019] Specifically, there is a layer of CPVC resin 2 inside the pipe 1. The smooth surface of CPVC resin 2 can reduce the contact area between the cable and the pipe wall, reduce the local temperature rise caused by frictional heat generation, and at the same time, the air gap between the pipe wall and the cable 7 is more uniform, which is conducive to heat dissipation during the operation of the cable 7 and extends the service life of the cable 7. There is also a layer of nano calcium carbonate 3 inside it. The particle size of nano calcium carbonate 3 is usually 10-100nm, with a large specific surface area and good dispersibility. When uniformly filled in the CPVC resin 2 matrix, it can form a "rigid particle reinforcement effect", which increases the tensile strength of the inner wall layer by 20%-30% and the flexural modulus by 15%-25%.

[0020] The internal fixing connection of the calcium-zinc stabilizer 4 is coated with an epoxy resin coating 5.

[0021] Specifically, a layer of calcium-zinc stabilizer 4 is present inside the nano-calcium carbonate 3. The fatty acid salts in the calcium-zinc stabilizer 4 have an internal lubricating effect, which can reduce the viscosity of the CPVC melt and reduce weld lines and surface roughness on the inner wall during extrusion molding. At the same time, its lubricity can reduce the frictional resistance between the inner wall of the pipe and the outer sheath of the cable 7, facilitating the laying of the cable 7 through the conduit. Inside, there is also an epoxy resin coating 5. After curing, the epoxy resin forms a three-dimensional network structure, and its tensile strength and elastic modulus are significantly higher than those of CPVC resin, which can form a deformation-resistant "support layer" on the inner wall of the pipe. When the pipe is subjected to radial compression or axial tension, the epoxy resin coating reduces localized concentrated stress by 30% to 40% through the stress dispersion effect, preventing the CPVC matrix from cracking due to stress concentration.

[0022] The epoxy resin coating 5 is internally fixed with glass fiber 6.

[0023] The fiberglass 6 is internally fixed with a cable 7.

[0024] Working principle: Inside the pipe 1, there is a layer of CPVC resin 2. The smooth surface of CPVC resin 2 reduces the contact area between the cable and the pipe wall, reducing the local temperature rise caused by frictional heat generation. At the same time, the air gap between the pipe wall and the cable 7 is more uniform, which is conducive to heat dissipation during operation of the cable 7 and extends the service life of the cable 7. Inside it, there is also a layer of nano calcium carbonate 3. The particle size of nano calcium carbonate 3 is usually 10-100nm. It has a large specific surface area and good dispersibility. When uniformly filled in the CPVC resin 2 matrix, it can form a "rigid particle reinforcement effect", which increases the tensile strength of the inner wall layer by 20%-30% and the flexural modulus by 15%-25%. Inside the nano calcium carbonate 3, there is a layer of calcium-zinc stabilizer 4. The fatty acid salts in calcium-zinc stabilizer 4 have an internal lubricating effect, which can reduce the viscosity of CPVC melt and reduce the weld lines and surface roughness of the inner wall during extrusion molding. Meanwhile, its lubricity reduces the frictional resistance between the inner wall of the pipe and the outer sheath of the cable 7, facilitating the laying of the cable 7 through the pipe. Inside, there is also an epoxy resin coating 5. After curing, the epoxy resin forms a three-dimensional network structure with significantly higher tensile strength and elastic modulus than CPVC resin, forming a deformation-resistant "support layer" on the inner wall of the pipe. When the pipe is subjected to radial compression or axial tension, the epoxy resin coating reduces localized stress concentration by 30%–40% through stress dispersion, preventing cracks in the CPVC matrix due to stress concentration.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A reinforced CPVC cable protection pipe resistant to tensile and tearing, comprising a pipe (1), characterized in that: The pipe (1) is internally fixedly connected with CPVC resin (2), the CPVC resin (2) is internally fixedly connected with nano-calcium carbonate (3), and the nano-calcium carbonate (3) is internally fixedly connected with calcium-zinc stabilizer (4).

2. The tensile and tear resistant reinforced CPVC cable protection pipe according to claim 1, characterized in that, The calcium-zinc stabilizer (4) is internally fixed with an epoxy resin coating (5).

3. The tensile and tear resistant reinforced CPVC cable protection pipe according to claim 2, characterized in that, Glass fibers (6) are fixedly connected inside the epoxy resin coating (5).

4. The tensile and tear resistant reinforced CPVC cable protection pipe according to claim 3, characterized in that, The glass fiber (6) is internally fixedly connected with a cable (7).

Images